Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cdf392d264a142…

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 04:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 134e502bd7d5bd4109db628759fae5bc SHA-1: 745cf2ca0c8c9de4a72a5d3df29f3a026b0c1014 SHA-256: 85cdf392d264a142d671e068ff11f93865cd99a3383cb87c2bd3318d6b7e20b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is designed as a lure, using the title 'Rick ross free mp3 download' to entice users. It contains a critical malicious redirector link to 'https://ttraff.com/wix?keyword=rick+ross+free+mp3+download', which is likely part of a phishing or malware distribution chain. Additionally, the document hosts a large number of SEO-optimized PDF links, many pointing to 'static.usrfiles.com', suggesting an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=rick+ross+free+mp3+download
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/tegagugexijuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/gefanejapepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/tejafowaxirugu.pdf
    • https://static.usrfiles.com/ugd/cd79e3_835cff1116364a3eb80203c279bbd80c.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_2b9653ad9e9d4f71bb6b42328f5b3cb5.pdf
    • https://static.usrfiles.com/ugd/ae059d_6e2b049fe724473bafdd7bef57773fd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb6451e830434a869b0256e0a060551a.pdf
    • https://static.usrfiles.com/ugd/078c79_983d91e42e284462af4af9eb9e19859d.pdf
    • https://static.usrfiles.com/ugd/80c1db_5ff0fc045f254e2eb7b64b511e11bcc6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c45bbef8a0f44397a919c1c8866c519b.pdf
    • https://static.usrfiles.com/ugd/e02969_0b8c25d5c4074961aaad03943ad6682e.pdf
    • https://static.usrfiles.com/ugd/0f5b72_e878edd77ea34056ab732928f7b1d232.pdf
    • https://static.usrfiles.com/ugd/f09a9d_602821ba0383432d9521db5b4caa8d7e.pdf
    • https://static.usrfiles.com/ugd/3b7182_8790026c60ed4cc59e4cafdd096d277d.pdf
    • https://static.usrfiles.com/ugd/de02f3_572fe8098f874df7ad32ff6c828f26d4.pdf
    • https://static.usrfiles.com/ugd/ad2ade_6096790d44f3414da0c7f7c5b011431e.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cf1.bin
8763569a5f5bfd1491fdf09940e73365c99545c1373e44d4813202e0968e94e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF1 5628 bytes
font_01_sfnt_off0000600f.bin
2fd4514592fcf8c980e380dce959e0ebc693b0775c3f37d54d6b4ca5d8fe158c
pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 10948 bytes